Improvement in ventilators for buildings



UNITED STATES PATENT EErcEo JOSEPH LEEDS, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN VENTILATORS FOR BUILDINGS.

Specification forming part of Letters Patent No. 39,937, dated September l5, 1863; antedated December 14, 1862.

.To all whom t may concern:

Be it known that l, JOSEPH LEEDS, of the cily of Philadelphia, in the State of Pennsylvania, have invented a new and useful Iniprovenient in Ventilators for Buildings; and I do hereby declare that the following is a full, clear, and exact description ot' the conV struction and operation of the saine, reference being had to the accompanying' drawings, making a part of this specification, in which- Figure l is a front View, and Fig. 2 a vertical central section, of the said improved ventdator, like letters indicating the saine parts when in both figures.

Ventilators of this class generally open into a ue, and require to be placed near the ceilings ot' the room to be ventilated; and, in consequence of the elevated position, at least two separate cords have heretofore been required to be suspended from each, in order to atl'ord appropriate nieans ot' operating the vibratory valveplate as occasion required.

rIhe object of iny invention is to render one cord sutticient for the purpose, and thus to simplify the construction and inode of operation, and lessen the cost, without diminishing the requisite power of controlling the ventilator properly.

It consists, substantially as hereinafter described, in so constructing and attaching the vibratory valve-plate to its frame or case that the gravitation of the former will give it a constant tendency to fall inward toward the tine, while the single cord suspended therefrom, and extending down to within convenient reach from the floor of the room, has attached within its usual ornamental tassel a weight, which can he regulated to slightly overcome the said gravitating tendency ot' the valve-plate, so that when it shall be desired either to open or close the ventilator all that will be necessaryr will be that the operator shall either li't upward or pull downward, accordingly, the said tassel to et't'ect the object.

In the drawings, A is the frame or ease of the ventilator; B, the vibratory valve-plate; O, the operating-eord; D, the ornamental tassel, and E the adjustable weight. The case A may be made to present in front any of the ordinary forms, having an ornamentally-perforated or skeleton face, with a sutiiciently long vertical opening, a', for the required free vertical motions ot' the cord which passes through it, and also a grooved pulley, a2, within its upper part, for guiding the said cord. The upper end and sides ot' the valveplate B tit against the back edge-s ofthe ease A, while its lower end lits between the lower ends ot' the sides otl the same and turns upon a journal, b, which projects from cach side of the plate and enters the sides of the case, the said lower end of the plate B being curved sutlieiently for the purpose, and the edges of the sides ot' the case A heilig sloped inward toward their lower ends, so as to allow the valve-plate B to have, when in contact with the said edges, an inclined position toward the liuc, which latter is indicated by the dotted lines rv fr, and consequently a constant tendency to fall backward or into the lue, substantially as is indicated by the dotted lilies y 1/ in Eig. 2. llhe cord O has its upper end lixed to the upper part of the Valveplate B, and extends dow-n over the pulley a2, and through the vertical opening' a', so as to bring its tassel D within convenient reach from the lioor of the room, as seen in the drawings. Within the tassel D the hollowr ease E is tixed to the end ofthe cord, so as to be concealed therein, and into this case E shot or other weights are placed in suliicient quantity to slightly overcome the falling tend ency ofthe valve-plate B when the same is in the inclined position seen in Fig. 2.

In the operation of this inventionit will be readily seen that when the weight E is pulled downward by hand until the valve-plate B is closed against the case A the t'oriner will so remain until the said weight is lifted by the operator, when the valve-plate will fall backward, and thus open the ventilator for the passage of air into the tlue.

Having thus fully described iny iniprovement in ventilators and pointed out its utility, what l claiin as new therein, ot' my invention, and desire to secure by Letters Patent, 1s-

Operating the valve-plate B ofthe Venti. lator by means of its gravitating tendency, in combination with the one cord, C, and a weight, E, attached to the lower end of the said cord, substantially in the manner described.

JOSEPH LEEDS.

Witnesses:

BENJ. Morrison, HOWARD KIRK. 

